The present and the future are the same. To know if the sentence is in the present or future we will use the context of sentence. The Japanese conjugation is very simple, there is the affirmative form and the negative form. It doesn't matter if we are in the 1st person singular, plural or another person it will always be the same conjugation, the only difference is if we affirm or not. Also we can use two forms, one polite and one neutral to use with friends.

taberu (manger) たべるAffirmativeNegative
Polietabemasu たべますtabemasen たべません
Neutraltaberu たべるtabenei たべない